Steam-boiler



(No Model.)

'J 'HILL.

STEAM BOILER. No. 268,673. Patented Dec. 5, 1882.

- liamsport, in the county of Lycoming and State of Pennsylvania, have inventeda new and use UNrT D STATES PATENT OFFICE. I

JOSEPH HILL, OF WILLIAMSPQRT, PENNSYLVANIA.

STEAM-BOILER.

' SPECIFICATION forming part of Letters Patent No. 268,673, dated December 5, 1882.

V Application filed May 15,1882. (Nomodeh) To all whom it may concern Be it known that I, JosEPH HILL, of Wilfnl Improvement in Steam-Boilers; andI do hereby declare that the following is a full and exact description of the same, reference being bad to the accompanying drawings, and to the letters of reference marked thereon.

The object of the invention which is hereinafter described andillnstrated is to so construct a stea m-boiler that the products ofcombustion may be utilized for heating purposes by being brought in contact with and converted into inflammable gases by combination with the exhaust-steam, which, by suitable means, is reintroduced in a reheated condition into the boiler, thereby greatly lessening the amount of fuel, and consequently greatly reducing the expense attending the employment of steamboilers, as well as serving to increase the draft for snpportingcombnstion.

To the accomplishment of the above the invention consists in the peculiar construction of the boiler, whereby the products of combustion, in their passage through the fines of the boiler, are mixed and combined in the same I fines with the exhaust-steam; and the invention further consists in the use of acap or covering, which is secured to or constitutes the rear end of the boiler, and is provided with a suit-ablespace or chamber, into which the exhaust-steam pipe is tapped. This cap is also provided with a number of pipes or tubes, which correspond to the fines of the boiler, opposite to or within the mouths of which they are arranged. These pipes communicate with the chamber or space above referred to, and through them the exhaust-steam is carried from said chamberiuto the fines of the boiler, where it is brought in contact with the products of combustion, passing through the same toward the smoke-stack. As the flames from the firebox strike directly upon the inner face of the cap or covering and its tubes, the exhaust steam, in passing therethrough, is reheated, and, being in this condition when brought in contact with the products of combustion, accomplishes effectively the object of the invention-via, the utilization of the products of combustion and the consequent saving of fuel, as well as the increase of draft.

For the better understanding of the invention reference will frequently be made throughout the following description to the accompanying drawings, which form part of this specification, and in which-- Figure 1 is a sectional view of the boiler, and Fig. 2 a view in detail, showing the construction of the cap or covering for the rear end of said boiler.

Like letters refer to corresponding parts in both views.

In the drawings, A represents the boiler proper; B, the domeof said boiler, through which live steam passes to the engine or machinery to be operated, any suitable connection being made between said dome and engine. At the front end of the boiler is snitablylo cated the smoke-stack O, which opens into a chamber or box, D, into which the products of combustion are discharged after passing through the fines of the boiler, the location of which fines will be hereinafter described. This box D may be provided with a removable or hinged covering to afford more ready access to the fines of the boiler for the purpose of cleaning them. The firebox E has a proper grate, a, at its lower front portion, and in such portion the bottom of the fire-box has a suitable opening to permit the increase of the air and the escape of ashes. 1n the space formed above thisfire-box E are placed a number of.

horizontal pipes, (marked 11 in the drawings,)

said pipes forming the fines of the boiler and extending from the front to the rear thereof. .At the front of the boiler they open into the box D, before mentioned, and at the rear end into a space formed between the end of said boiler and the inner surface of a cap or covering, F, which is secured to or constitutes an end. of the boiler, and whichis to be hereinafter described. By this arrangement the products of combustion are carried from the firebox E through the fines b and discharged into the box D, whence they escape through the smoke-stack (J.

The construction of the cap F, before referred to, is clearly shown in Fig. 2 of the drawings. As shown in that figure, it is provided on each side with projecting edges 0 d d, by means of I which it may be conveniently secured iirposition, either permanently or in a removable way. To the inner surface of this cap are firmly secured, in any desirable manner,a number of pipes, e. These pipes e correspond in number to the fines b, before mentioned, and when the cap is in position on the boiler they occupy a position which will bring them di rectly opposite and in close proximity to said fines b, or within the months of said fines, in which case said pipes should be so much smaller than the said fines as will allow the passage of the products ot'combustion through said fines. It the cap F be of the form which is herein shown, it will be necessary to vary the length of these pipes e in order that their outer ends may be in the same plane. On the inside of this cap F is placed an extra-or additional wall,f, to which are secured the pipes 0, above mentioned, and between which and the outer wall or wall proper of said cap a space or chamber, 9, is formed. Into this chamber the steam exhanst pipe it enters, as also do the pipes 0. Throughout the preceding reference has been made to a stationary boiler only. Should, however, it be desired to use the boiler on motors, it will be advantageous to provide it with an apron similar to one shown in dotted lines in Fig. 1. As shown in that figure, this apron is scoured to the boiler at a point directly under the grate with which the fire-box E is provided. This apron serves to catch the air and to materially increase the draft on the fire.

Having thus described separately the different parts of the boiler, and having shown the position and use of each of said parts and their connection the one with the other, I will now describe the operation. of the whole.

The fire being kindled in the fire-box E, the products of combustion are carried to the rear end of said fire-box, and thence into the flnes b of the boiler, as indicated by arrows in Fig. 1. The live steam thus generated is carried off through the dome B to the engine to be operated. The exhaust-steam is returned through the exhaust-pipe h to the chamber g, formed in the cap F. From this chamber, which is thoroughly heated by reason of the direct impact of theflames againstit, the exhaust-steam, which is reheated by its passage through said jacket, is carried through the pipes e, where it is still more heated, into the fines b, opposite to which the pipes e are located. Upon its entrance in this heated condition into these fines b the exhaust-steam mingles and combines with the products of combustion, fortning inflammable gases of great heatingpower, which burn in said fines, thereby saving fuel to a great extent. I do not assert any theory for this result, but am convinced by much experiment of the fact that there is a great increase of heat by means of the construction above described, and consequently a saving of fuel. From these flnes these products of such combustion escape into the box D, into which the pipes I) open, and thence to the open air through the smoke-stack 0, having also materially increased the draft.

Having thus described my invention, what I claim as new therein, and that for which I desire to secure Letters Patent, is-- l. The combination, in a steam-boiler, of the cap F, composing the rear end of the same, against the inner wall of which the products of combustion strike on their way from the fire-box to the fines, said cap having a chamber provided with an inlet for exhaust-steam from the engine, and outlet-pipes terminating near the boiler-fines and the smoke-stack, all

constructed and arranged so that all the steam from the cap F passes directly from such cap into the smoke-stack with the products of combustion, substantially as described.

2. In a steam-boiler, the combination of the steam cap F, provided with inlet and outlet pipes, the firebox E, the ash-pit provided with the apron i, the flues b,and smoke-stack O,all arranged and operating substantially as described.

This specification signed and witnessed this 11th day of May, 1882.

- JOSEPH HILL.

Witnesses:

V. H METZGER, HARRY S. MEYER. 

